1 E3F (8~{a}~{R},12~{a}~{S},13~{a}~{S})-12-ethylsulfonyl-3-methoxy-5,6,8,8~{a},9,10,11,12~{a},13,13~{a}-decahydroisoquinolino[2,1-G][1,6]naphthyridine 1.000 2 E33 (8~{a}~{R},12~{a}~{S},13~{a}~{R})-12-ethylsulfonyl-3-methoxy-5,6,8,8~{a},9,10,11,12~{a},13,13~{a}-decahydroisoquinolino[2,1-G][1,6]naphthyridine 1.000